Typewriting-machine



0. WOODWARD.

TYPEWRITING MACHINE.

APPLICATION man MAY 29, 1919 Patented Mar. 8,1921.

4 SHEETS-SHEET 1- WITNESSES (4%! Hi5 ATTEIRNEY 0. WOODWARD.TYPEWRIil'iNG MACHINE- APPLICATION FILED MAY 29, 1919.

4 SHEETS-SHEET 2- INVENTUR MM Patented Mar. 8, 1921.

H15 ATTORNEY Patented Mar 8, 1921 4 SHEETS-SHEET a INVENTDR HIS ATTORNEY0. WOODWARD. TYPEwmTme MACHINE. APPLICATION FILED MAY 29 I919 WITNESSES4%4% 0. WOODWARD. T YPEWRITING MACHINE.

APPLICATION FILED MAY29,1919.

1,370,772. Patented Mar. 8, 1921.

'4 SHEETS-SHEEI 4.

- n I m 1 Q 5 g S \\\\\W E E i WITNESSES v INVENTDR @M 9% HIE ATTURNEYUNITED STATES PATENT I OFFICE.

OSCAR woonwann, or BABYLON, NEW You, ASSIGNOR'TO REMINGTON 'rYrEw'mrEnconrm, or 112101;, NEW YORK, A conronarron or NEW YORK.

mnwm'rme-iracmmz.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed 11293.29, 1919. Serial No. 800,571.

ple and strong construction which is reliable and effective 1noperation,which is not apt to become disarranged or broken, and which is easy toassemble and mount in the machine or to be detached therefrom whendesired. More specifically stated, one of the main objects of myinvention is to provide a construction in which various parts may beassembled outside of the machine and readily introduced therein as asingle unit, or may be detached 'as a single unit, or in which variousparts or combinations may be detached independently of others whendesired. To the above an other ends which will hereinafter appear, myinvention consists in features of construction, arrangements of artsandcombinations ofdevices set forth 1n the following description andparticularly pointed out in the appended claims.

In the, drawings wherein like reference characters indicatecorresponding parts in the various vlews,

Figure 1 is a fragmentary vertical sec tional view showing a portion ofthe back space mechanism and some of the associated parts, the sectionbeing taken on the line w w of Fig. 2 and looking in the direction ofthe arrow at said line.

Fig. 2 is a fragmentary top plan view with parts in section of thecomplete back space mechanism and some of the associated parts. a

Fig. 3 is a side elevation of the same with parts in section.

"Fig. 3 is a fragmentary front view of the guide comb and some of theassociated parts. Fig. 4 is an enlarged fragmentary detail sectionalview showing a modified form of buffer which co-acts with the adjustablestop to limit the return movement of the back space means to normalposition.

Fig. 5 is an enlarged detail transverse sectional view showing thedetachable connection between the back space means and the actuatingmeans therefor, the section being taken on the line w a: of Fig. 1 andlooking in the direction of the arrow at said line.

F1g. 6 is an-enlarged detail perspective view with parts in section ofthe connected brackets secured in place and some of the parts carriedthereby.

Fig. 7 is an enlarged detail vertical fore and aft sectional view of apart of the construction, the view being taken on the line 3 y of Fig. 9and looking in the direction of the arrow at said line.

Fig. 8 is an enlarged detail rear view of the escapement wheel shownmounted on its shaft.

Fig. 9 is an enlarged detail fragmentary transverse sectional View ofthe parts shown in Fig. 7, the section being taken on the line 2 a ofFig. 7 and looking in the direction of the arrow at said line.

The invention may be embodied in various styles of typewriting and likemachines and in the present instance is shown embodied in a machine likethe No. 10 or No. 11' Remington machine.

The main frame of the machine comprises abase 1, corner posts 2 and atop plate 3. A platen 4 is carried by a suitable carriage mounted tomove from side toside over the top plate of the machine. The carriagecarries the usual feed rack 5 which meshes with a feed pinion 6 tocontrol the step-by-step letter feed movements of the carriage, and

also to control the step-by-step back spacing movements thereof. Theoperation of the pinion in one direction is controlled by the letterspace mechanism, whereas the intermittent back spacing movements of thepinion in the opposite direction are controlled by back spacingmechanism, as will hereinafter more clearly appear. I

So far as the main features, of the present invention are concerned theback spacing mechanism may be actuated by any suitable key controlledactuating devices in the base of the machine. In the present instancethe back spacing lever 7 is fulcrumed at 8 in the base of the machineand is returned to its normal positionby a returning spring 9. A key 10is provided at the forward end of the lever 7 at the keyboard. of themachine to control the actuation of the back spacing mechanism. Anabutment 11 on the lever 7 coacts with a vertically adjustable pin orstop 12 carried by a sheet metal cross bar 13 secured to the base of themachine. The pin 12 limits the depression of the key lever 7, whereasits return movement is limited by a projection 14 on the key leverco-acting with a pad 15 carried bya cross bar 16 forming part of orsecured to the base of the machine.

The sto pin 12 in the present instance is threaded .mto a tap ed openingin the cross bar 13 and is locked in its adjusted position by a lock nut12*, as best shown in Figs. 3 and 3*. In order to provide suflicientstock 'in which to screw the pin, I prefer to reinforce the sheet metalcross bar with an additional strip of metal 13 which is secured to thecross bar, preferably by welding, and is tapped with it to receive thethreaded pin 12. The length of the reinforcing strip need be onlysufficient to receive several closely related pins similar to the pin12; the other pin shown in Fig. 3 being employed to limit the depressionof the adjacent case shift key, for example. It will be I observed thatthese stop pins are so close together that the lock nuts, such as 12cannot be arranged side by side. I therefore place the lock nut of onepin above the cross bar and the lock nut of the next pin below the crossbar, thus effecting a staggering overlapping arrangement of the nutsthat enables them to be placed in position and adjusted withoutinterference one with another.

A forward guide comb 16 for the key levers receives the back spacinglever 7 between adjacent teeth thereof as shown in Figs. 3 and 3. Moreforce is usually exerted on the back spacing key than is applied to theprinting keys. In order that lateral pressure exerted by the lever 7 onits coacting teeth of the comb will not result in spreading the teethapart, I connect such teeth together'at their lower ends, as at 16*, sothat these teeth are connected at their lower ends as well as at theirupper ends, and efi'ectivel resist any tendency to spread them apart ythe action of the lever 7- thereon when in use.

An upwardly extending arm 17 on the key lever 7 is pivoted to anupwardly and rearwardly extending two-part link 18 by a shouldered ivotscrew 19. From an inspection of ig. 3 it will be seen that the point ofconnection 19between the lever 7 and the parts controlled thereby isabove a straight line extending through the key 16 and the fulcrum 8 of'the lever. Moreover, from an examination of Fig. 2 it will be seen thatthe link 18 is in the plane of movement of the lever 7. The result ofthis construction is that an actuation of the back spacer may beefiected without any tendency to tilt the lever 7 laterally, and adirect straight line pull on the link and on the part to which it isconnected at its upper end, is produced, thereby avoiding all lateralstrain and binding of the arts.

rock shaft is received and supported in bearings in depending lugs 25 onthe top plate of the machine. A collar 26 is fixed to the shaft 2/1. bya screw 27. .From an inspection of Fig. 2 it will be seen that the arm21 is arranged on the shaft outside of one of the depending supportinglugs 25, whereas'the collar 26 is arrangedon the shaft inside of saidbearing lug, the arm or its hub co-acting with a lug on one side and thecollar coacting with a lug on the opposite side to prevent or limit thelongitudinal displacement of the shaft 24 in its bearings. A coiledspring 28 surrounds the shaft 24 and bears at one end, as at 29, againsta depending bracket arm 30 on the top plate. The

other end 31 of the spring is turned around 1 the screw '27, thus ineffect connecting this end of the spring to the shaft. The inner endportion of the shaft 24 carries a rearwardly and downwardly extendingcrank arm 32 provided with a hub 32 secured to the shaft by a screw 32*.The crank arm at its rear end carries a bearin V or member 33, as bestshown in Fig. 5. his member has a reduced portion 34 by which a shoulder35 is formed on the member. The reduced portion 34 constitutes a hearingwhich is received in an aperture in the lower end of a link 36. The linkis retained against displacement from the bearing portion of opening inthe member and the head of which extends beyond the reduced portion 34to revent the link from being displaced there rom except when the screw37 is removed. This construction provides means for detachablyconnecting the back space actuating means comprising the lever 7 link18, rockshaft 24: and its crank arms 31 and 32 from the link 36 and theback space means of which the latter may be said to form a part. It willbe seen, moreover, particularly from an inspection of Figs. 1 and 3,that the location of this connection between the crank arm 32 and thelink 36 extends below the top plate, and below the various supportingbrackets, etc., carried thereby, a sufiicient distance to enable readyaccess to be had to the connection from outside the machine withoutinterference by the parts referred to.

The means for supporting the back spacing means and the escapementmechanism constitutes an important feature of the present invention andmaybe said to comprise in the main two brackets, one a main bracket 39and the other an auxiliary bracket 40. The bracket 39 is detachablysecured to the toppllate of the machine by two screws 41 w ic extendfrom above through openings in the top plate and are received in 'tappedopenings 42 in the bracket 39.

This bracket constitutes a support for a detachable dog rocker orcarrier 43, one trunnion of which is pivotally supported on the bracketby the coned end of a screw 44 received in a tapped opening in an arm 45of the bracket and secured in its adjusted position by a lock nut 46.The other trunnion of the dog rocker is supported in place b the conedend of a pivot pin 47 seated in a earing opening in an arm 48 of thebracket. The pin 47 is held in position in its bearing by a set screw 49received in a tapped opening in the arm 48 and bearin at its inner endagainst the pivot pin. y loosening the screw 49 the pin 47 may bewithdrawn from engagement with the dog rocker and the latter may thus bereadil detached from its supporting bracket 39. 11 order to furtherfacilitate the removal of the dog rocker, a depending arm 50 adjustablysecured thereto is detachably connected to the dog rocker actuatingmeans in a manner disclosed in my application Serial No. 278,657 filedFebruary 24, 1919. In Fig. 6 of the drawings I have shown enough ofthese connections to illustrate how the dog rocker may be readilydetached when the pivot pin 47 is withdrawn from coiiperation with thedog rocker. Thus it will be seen that a motion transmitting link 51 isforked at its rear end, as at 52, and coiiperates with a headed pin 53carried by the depending adjustable arm 50 on the dog rocker. Thisconnection, as will be readily understood, enables the dog rocker to bedetached from the link 51 and the actuating means which are operative onthe link. The bracket 39, it will be observed, is detachably secured tothe top plate of the machine and extends below the same, whereas thebracket 40, hereinbefore referred to, extends above the top platethrough an opening 3 therein. The bracket 40 receives its support on thebracket 39 and is detachably secured to the latter by screws 54 and 54.A portion of the bracket 40. is in the nature of a yoke providing abearing 55 in one ofthe arms thereof in which a reduced cylindricalbearing 56- of an escapement wheel shaft 57 is received and adapted tohear. The other arm of the yoke-like portion of the bracket is formedwith a split bearing 58 adapted to receive a sleeve or bearing member59. The bore or cylindrical opening in which the member 59 is receivedis shown in the present instance as smooth, though it'may be otherwiseformed if desired, and permits an axial adjustment of the member 59therein. A headed screw 60 passes freely through an openin in adepending lug at one side of the sp it bearing and is received in atapped opening in a depending In at the opposite side of the hearing, asilustrated in Fig. 6. This last mentioned lug is formed rigid with thebracket 40, so that such movement as takes place between the lugs is duewholly to the movement of the other lug toward or away from the fixed luThe purpose of this construction is to a ways maintain the bearingmember 59 properly centered against a fixed portion of the split bearingin which it is received. By turning the screw 60 in one direction themovable side of the bearing may be drawn toward the fixed side toeffectively clamp the bearingmember 59 in place, and in the position towhich it may be axially adjusted in the bearing. The bearing member 59is adapted to receive a reduced cylindrical bearing portion 61 on theshaft 57, and thus support the shaft in position. The reduced ends orbearings 56 and 61 at their points of joinder with the shaft 57 formshoulders, one of which bears against the bearing member 55 to receivethe thrust of the shaft in one direction, and the other of which bearsagainst the inner end of the bearing member 59 to receive the thrust ofthe shaft in the opposite direction. By a proper adjustment of thebearingmember 59 lengthwise movement or end shake of the shaft isprevented. The feed pinion 6, hereinbefore referred to, is preferablyformed as a part of a sleeve 62 provided at its opposite end with anintegral ratchet wheel 63. The combined feed pinion 6, sleeve 62 andwheel 63 receives a bearing on the escapement wheel shaft only at 64 and65, the sleeve bein free from contact with the shaft interme iate thesetwo bearing portions. The sleeve may be provided with an il inlet 66which enables oil to be introduced into the small chamber 67intermediate the sleeve and shaft and between the bearing portions 64and 65, so that oil introduced through the opening 66 may be fed tothese bearing portions 64 and between the sleeve and shaft. Anescapement wheel 68 is provided, with an enlarged central opening bywhich it may be seated on a hub 69 and against a circular flange 70which pIrojects from the hub at one side thereof.

eaded screws 71 extend through openings in the escapement wheel and arereceived in tapped openings in the flange 70, thus securingtheescanement wheel to its hub. Set screws 72 extend through tappedopenings in the outwardly extending end 69 of the hub 69 and bear attheir ends against.

flat sides 73. of the shaft, thus fixedly connecting the escapementwheel to turn with the shaft. The wheel 63 hereinbefore referred forcooperation with a back spacing pawl,

whereas the inner end portions 77 of the teeth form internal teeth, soto speak, for

cooperation with a pawl 78 contained within to the the wheel. It is inthis sense that I have referred to the wheel 63 as a double wheel, onepawl co-acting with the teeth from the outside thereof and another pawl78 co-acting with the teeth from the inside of the wheel.

This double wheel and the manner of forming the teeth thereon was notinvented by me and is not claimed herein. The pawl 78 is mounted on apivot pin 79 carried by and riveted to the hub 69 of the escapementwheel. The tail of this pawl is provided with an enlarged opening 80adapted to receive one end 81 of a bow, or substantially semi-circularspring 82. The opposite end of this spring is connected to and has aslight ivot'al movement on a pin 83 riveted hub of the escapement wheeland projectin into'the recess in the double wheel 63. rom an inspectionof Fig. 9 it will be seen that the diameter of the opening 80in the pawlis greater than the. diameter of the wire spring received therein, sothat the spring bears only at one end against the bottom wall of theopening 80 and cannot interfere with the pivotal movement of the pawl.The tension ofthe spring 82 is exerted so that the free end thereoftends' to be drawn toward the pin 83, thus exerting a force which tendsto turn the pawl on its pivot, so that the engaging projection .84 onthe pawl will seat itself between the teeth and engage the inner edgeportions 77 thereof. This construction causes the escapement wheel andthe double wheel 63 to turn together in one direction, but enables thewheel 63 to be turned in the opposite direction, independentl of theescapement wheel. By formin t e double wheel in the manner specified,fam enabled-to in effect provide a single series of teeth to do the workof two wheels or two separate sets of teeth, thereby easily overcoming adifficult problem of cutting teeth within a recess in the wheel; cuttingbut one set of teeth instead of two"; avoiding the inaccuracies inrelative spacing and registration which are bound to follow fromseparately cutting two independent sets of teeth, and reduclnginaccuracies in cutting to a minimum.

The pawl and ratchet mechanism including'the spring 82 and the manner ofcon; necting it with the pawl are not claimed herein but are claimed inmy divisional case Serial No. 368,839 filed March 26, 1920.

Coiiperating with the back spacing wheel is a back space pawl 85 pivotedat 86 to a pawl carrier lever or member 87 which in turn is pivoted at88 to an upright arm 89 of an auxiliary support or bracket 90 detachablysecured by screws 91 to the bracket 40. The engaging nose 92 of the pawlcooperates with the teeth of the back space wheel to turn the wheel onestep at each depression of the back space key, as will hereinafter moreclearly appear. It will be seen that the member 87 which carries thepawl is pivoted to its support at the left or at one side of the backspacing wheel and extraneous to the center thereof and passes beneaththe escapement wheel shaft and does not interfere with the independentremoval of the latter. A coiled contractile spring 93 is connected atone end to a pin 94 projecting from the auxiliary bracket 90 and at itsopposite end to a pin 95 projecting from the member 87. The member 87extends beyond its pivot where it is provided with a turned over bearingportion or lip 96. This is covered with felt or some such material at97, where it is adapted to bear against an enlargedhead 98 of anadjustable screw or stop 99. This screw is received and extends througha tapped opening in the arm of the yoke-like portion of the bracket 40and may be secured in its adjusted position on the bracket arm by a locknut 100. The screw stop co-acting with the member 87 limits the retlirnmovement of this part, and the elements connected therewith, to normalposition, the parts being returned to such position by the spring 93hereinbefore referred to. The upper end of the link 36, which aspreviously pointed out is detachable at its lower end to the back spaceactuating means, is pivoted at 101 to the back space pawl. A pin 102projects laterally from the link 36 and is adapted to coact with oneedge of the back space pawl when the parts complete their back spaceoperation, thus locking the pawl against further movement while it is inengagement with the back space wheel, and thereby preventing anoverthrow of the wheeland the carriage controlled thereby.

The member 87 preferably carries a pin 103 which projects forwardlytherefrom over an arm or lug 104 of a locking device designated asa-whole by thereferencenumeral 105. This locking device is ivoted at-106on a bracket 107 secured to t e rear carriage rail 108. Aspring 109tends to turn the locking device 105 on its pivot to the lockingposition where the hook-like end 110 of the locking device-extends overthe feed rack 5 and prevents a disengagement that when the member 87 isliftedthe pin 103 will be elevated, thus enabling the spring 109 to turnthe locking device into operative position, bringing the hooked end 110thereof over the feed rack. As the member 87 returns again to normalposition the pin 103 descends, carrying with it the arm 104 and movingthe device 105 to the normal position shown in Fig. 3 where it is heldout of cooperation with the feed rack. This device is somewhat similarto that emplo ed in the Nos. 10 and 11 Remington mac ines, the purposeand effect of the device in both cases being the same.

In an operation of the back spacing mechanism a depression of the key 10is effective to rock the shaft 24 and effect an upward movement of thelink 36. This movement is transmitted to the back space pawl 85, turningthe latter on its pivot 86 into engagement with the back space wheel atthe first portion of the stroke. A further movement of the parts iseffective to cause the pawl carrying member 87 and the back spacingwheel to move together, the member 87 turning on its pivot 88. At thecomple tion of the back spacing movement the pin 102 on the link 36 andthe edge of the pawl 85 are brought into engagement, thus preventing thepawl from.be1ng forced out of engagement with the wheel and locking thewheel against overthrow. The back spacing movement thus transmitted tothe wheel 63 is effective to turn it and the feed pinion 6 in adirection opposite to that which it ordinarily receives in astep-by-step letter feed movement of the carriage and to cause thecarriage to receive a letter'space movement to the right. Ashereinbefore explained, a depression of the key is effective to releasethe lock 105 and permit it to be moved by its spring 109 to a lockingposition, thereb preventing a disengagement of the feed rac 5 from meshwith the feed pinion 6, and when pressure on the back spacing key isreleased, the lock will be restored to normal or releasing position.

In Fig. 4 I have shown a modified form of bufi'er construction forlimiting the return movement of the back spacing means. In thisconstruction a piece of felt or like material 97 is riveted or otherwisesecured at 111 to one side of the sheet metal member L12 which is thesame in all respects as the member 87, except that it is not turned toform a bearing lip 96 but has the buffer serious parts carried thereby,may be assemcured thereto against one side to present the bufferedgewisefor cooperation with the head 98 of the adjustable stop or screw 99-.

From the foregoing description it will be understood that the dog rockermay be mounted and adjusted on the dog rocker bracket outside of themachine; that the auxiliary bracket 40, together with the vabled out ofthe machine and secured to the bracket 39; that the various partscarried by both brackets may be assembled and adjusted relatively toeach other, and all the parts introduced as a single unit into themachine, being detachably secured to the.

top plate thereof by the screws 41. It will be seen,moreover, that ifdesired the escapement wheel shaft and the parts carried thereby may beinde ndently detached from the machine; that t e dog rocker if desiredmay be independently detached from the machine; and that if desired theauxiliary bracket 40, together with all'of the parts carried thereb maybe detached from the bracket 39 an independently removed from themachine, orboth brackets 39 and 40, together with all of the partscarried thereby, may. be detached from the machine as a single unit. Bythese means I am enabled to readily assemble and adjust the parts rela-'tively to' each other outside of the machine and introduce them as aunit into the machine or remove the parts as ,a unit or separably, asmay be desired. There is no a1- ternation in the relation between theparts the parts carried thereby. At this time the combined feed inion,sleeve and wheel 63 may be remove from the shaft without detaching theesca ement wheel therefrom or altering its relation of the wheel to theshaft. When the escapement wheel shaft is mounted in position one end ofthe feed pinion is adapted to bear against the inner side of the bearing55 and prevent a movement of the combined feed pinion, sleeve and wheel63 in one direction along the shaft, a movement of such parts in theopposite direction being prevented by a forward extension 69 on the hubof the esca ment wheel.

Ordinarily hereto ore the escapementwheel and its shaft, etc., we emounted on the top plate above the same, and the dog carrier wasindependently mounted on and beneath the top plate. In suchconstructions difiiculties were encountered in obtaining an accuraterelation between the feed dogs and the escapement wheel. Inequali- Irequired. Moreover, each time either the dog carrier bracket or theescapement wheel bracket is detached great care must be exercised whenthe part is returned to obtainthe proper adjustment or correlationbetween the feed dogs and escapement wheel.

It will be seen that by my present construc-' tion of a feed rackcarried, by the carriage,

. said shaft and the parts carried thereby to' an escapement wheelshaft, a feed pinion carried by said shaft and meshing with said rack,-back space and escapement Wheels mounted on said shaft, back space meanscoacting with said back space wheel, a dog carrier, and means whichenable all of said parts except the feed rack and carriage to beintroduced into or detached from the machine as a single unit.

2. In a typewriting machine, the combination of a feed rack carried bythe carriage, an escapement wheel shaft, a feed pinion carried by saidshaft and meshing with said rack, back space-and escapement wheelsmounted on said shaft, backspace means co-acting with said back spaceWheel, a dog carrier, means which enable all of said parts except thefeed rack and carriage to be introduced into or detached from themachine as a single unit, and means which enable be detachedindependently of the other parts mentioned.

3. In a typewriting machine, the combination of a feed rack carried bythe carriage, an escapement wheel shaft, a feed pinion carried by saidshaft and meshing with said rack, back space and escapement wheelsmounted on said shaft, back space means co-acting with said back spacewheel, a dog carrier, means which enable all of said parts except thefeed rack and carriage to be introduced into or detached from themachine as a single unit, and means which enable said shaft and theparts carried thereby together with said coacting back space means to bedetached as a, single unit independently of the dog carrier.

4. In a typewriting machine, the combination of a feed rack carried bythe carriage, an escapement wheel shaft, a feed pinion carried by saidshaft and meshing with said rack, back space and escapement wheelsmounted on said shaft, back space means co-acting with said back spacewheel, a dog carrier, means which enable all of said parts except thefeed rack and carriage to be introduced into or detached from themachine as a single unit, means which enable said shaft and the partscarried thereby together with said backspace means-to be detached asingle unit independently of the dog carrier, and means which enable aseparate and independent detachment of said back space means to beeffected.

5. In a typewriting machine, the combination of a feed rack carried bythe carriage,

an escapement wheel shaft, a feed pinion carried by said shaft andmeshing with said rack, back space and escapement wheels mounted on saidshaft, back space means co-acting with said back space wheel, a dogcarrier, means which enable all of said parts except the feed rackandcarriage to be introduced into or detached from the machine as a sinle unit, separate-means which enable sai shaft and the parts carriedthereby to be detached independently of the other parts mentioned,separate means which enable said shaft and the partslcarried therebytogether with said coacting back space means to be detached as a smgleunit lndependently of the dog carrier, and separate means which enable aseparate and. independent detachment of the dog rockertO be effected.

6. In a typewriting machine, the combination of a dog carrier bracketdetachably secured to the top plate of the machine, back space actuatingmeans in the base of themachine, back space means extending above thetop plate of the machine and detachably 1 connected to said actuatingmeans and carried in its entirety by and detachable as a unit with saiddog carrier bracket, and means for enabling said back spacing means tobe detached as a unit from said dog carrier bracket.

7. In a typewri'ting machine, the combination of a'dog carrier bracketdetachably nation of a dog carrier bracket detachably secured to the topplate of the machine, a dog carrier carried by said bracket below thetop plate and detachably mounted thereon, an auxiliary bracket extendingabove the top plate and carried wholly by said dog carrier bracket anddetachable therewith and independently thereof, back space actuatingmeans on the frame of the machine,

and back space means extending above the top plate and carried in itsentirety by said auxiliary bracket and detachably connected to saidactuatingmeans whereby the dog carrier, both brackets and back spacemeans may be introduced into or detached from the machine as a singleunit, or the do carrier may be separately removed, or t e back of thedog carrier.

space means may be removed independently 9. In a typewriting machine,the combination of a dog carrier bracket detachably secured to the toplate of the machine, a dog carrier carried by said bracket anddetachably mounted thereon, an auxiliary bracket carried wholly by saiddog carrier bracket and detachable therewith and independently thereof,a feed pinion and connected back space wheel carried by said auxiliarybracket, co-acting back space devices carried by said auxiliary bracket,and back space actuating means on the frame of the machine anddetachably connected to said back space means whereby the dog carrier,feed pinion, back space wheel, and back space devices may be introducedinto or detached from the machine as a unit, or the back space device,wheel and feed pinion may be detached as a unit independently of the docarrier.

10. n a typewriting machine, the combination of a dog carrier bracketdetachably secured to the top plate of the machine, a dog1 carriercarried by said bracket and detac ably mounted thereon, an auxiliarybracket carried wholly by said dog carrier bracket and detachabletherewith and independently thereof, an escapement wheel shaft carriedby said auxiliary bracket, an escapement wheel carried by said shaft, aback space wheel and feed pinionalso carried by said shaft, back spacedevices carried by said auxiliary bracket, and back space actuatingmeans carried by the frame of the machine and detachably connectedtosaid back space devices.

11. In a typewriting machine, the combination of a dog carrier bracketdetachably secured to and arranged below the top plate of the machine, adog carrier detachably mounted on said bracket, an auxiliary bracketextending above the top plate of the machine and carried wholly by anddetachably secured to said dog carrier bracket.

12. In a typewriting machine, the combination of back space meansincluding adjustable means for limiting the return movement of the partsto normal osition, and means which enable said bac space means togetherwith said adjustable limiting means to be attached to. and detached fromthe machine as a single unit.

13. In a typewriting machine, the combination of a bracket detachablefrom the machine, and back spaoe means including an adjustable stop forlimiting the return.

movement of the arts to normal position, and a noise reducing bufferinterposed between said stop and the part which co-acts therewith, saidback space means bein carried by and detachable with said brac et as asingle unit.

14. In a typewriting machine, the combination of a bracket detachablefrom the machine, a back spacewheel carried by said bracket, a feedpinion connected to said wheel, a lever carried by said bracket, a backspace pawl carried by said lever and cooperative with said wheel, and anadjusttachably securing one of said brackets to.

the top plate of the machine so that the brackets may be introduced intoand detached from the machine as a single unit together with the partscarried thereby, or one of said brackets together with the parts carriedthereby may be separately detached as a single unit.

16. In a typewriting machine, the combination of two supporting bracketsdetachably connected together, one extendin above and the other belowthe top plate 0 the machine, means for detachably securing one of said'brackets to the top plate of the machine so that the brackets may beintroduced into and detached from the machine as a single unit togetherwith the parts carried thereby, or one of said brackets together withthe parts carried thereby may be separately detached as a single unit,back space actuating means carried by the frame of the machine, and backspace means detachably connected to said actuating means and carried inits entirety by one of said brackets. a

17. In a typewriting machine, the combination of two supporting bracketsdetachably connected together, one extending above and the other belowthe top plate of the machine, means for detachably securing one of saidbrackets to the top plate so that the brackets may be introduced intoand detached from the machine as a single unit together with the partscarried thereby, or

one of said brackets together with the parts nation of two supportingbrackets detachably connected together, one extendin above and the otherbelow the top plate of t e machine, means for detachably securing one ofsaid brackets to the top plate so that the brackets may be introducedinto and detached from the machine as a single unit together with theparts carried thereby, or one of said brackets together with the partscarmounted, and back space actuating means carried by the frame of themachine and detachably connected to said back space means.

19. In a typewriting machine, the combinationnof two supporting bracketsdetachably connected together, one extending above and the other belowthe top plate of the machine, means for detachably securing one of saidbrackets to the top plate so that the brackets may be introduced intoand detached from themachine as a single unit. to-

gether with the parts carried thereby, or one of said brackets togetherwith the parts carried thereby may be separately detached as a singleunit, an escapement wheel shaft detachably mounted on one of saidbrackets, an escapement wheel and feed pinion carried by said shaft,escapement devices cooperative with the escapement wheel and detachablymounted as a unit on the other of said brackets, a back space wheel onsaid shaft and connected with said feed pinion, back space meansco-acting with said back space wheel and carried in its entirety by thesame bracket on which said shaft is mounted, and back space actuatingmeans carried by the frame of the machine and detachably connected tosaid back space means.

20.- In a typewriting machine, the combination of a top 'plate having anopening therein, two supporting brackets detachably connected togetherone extending above and the other below the top plate through saidopening, operating parts carried by each of said brackets, and means fordetachably securing one of said brackets to said top plate so that thebrackets may be introduced into and detached from the machine throughsaid opening as a single unit together with the parts carried thereby,or one of said. brackets together with the parts carried thereby may beseparately detached as a I single unit.

21. Ina typewriting machine, the combi nation of an escapement wheelshaft with parts'mounted thereon, and means for detachably mounting saidshaft in place, said means comprising a bearing member in which one endof the shaft is seated, a split bearing with a smooth bore in which saidmember is seated and adapted to be adjusted axially of said shaft and ascrew by which the split bearing is contracted to clamp and hold thebearing member in its adjusted position in the bore.

22. In a typewriting machine, the combination of an escapement wheelshaft with parts mounted thereon, said shaft having a reduced end whichforms a shoulder, and means for detachably mounting said shaft in place,said means comprising a bearing member in which the reduced end of theshaft is seated and against which the shoulder bears to receive anendwise thrust of the shaft, a-split bearing with a bore in which saidmember is seated and adapted to be adjusted axially of said shaft, and ascrew by which the split bearing is contracted to clamp and hold thebearing member in its adjusted position in the bore. c

23. In a typewriting machine, the combination of an esca ement wheelshaft above the top plate of t e machine, a dog carrier below the topplate of the machine, means which enable said escapement wheel shafttogether with the parts-carried thereby and the dog carrier to beintroduced into or detached from the machine as a single unit, and meanswhich enable the escapement wheel shaft together with the parts carriedthereby to be detached from the machine independently of the dogcarrier.

24. In a typewriting machine, the combination of a dog carrier bracket,a separateand distinct bracket for the escapement Wheel shaft,thislastmentioned bracket being detachably secured directly to said dogcarrier bracket, so that one of said brackets constitutes a support. forthe other and the detachment of one bracket independently of theothermay be effected, and means which enable both of said brackets andthe parts carried thereby to be introduced into or detached from themachine as a single unit.

Signed at the borough of Manhattan, city of New York, in the county ofNew York and State of 'New York, this 26th day of May, A. D. 1919.

OSCAR WOO'DWARD. Witnesses:

CHARLES E. SMITH, E. M. Wants.

